Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 03 October 2017 - 13 October 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
Test material
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Physical appearance: white powder with lumps
- Test item storage: at room temperature protected from light
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- 59.5 °C
Any other information on results incl. tables
TGA EXPERIMENT (PRELIMINARY TEST)
- 25% weight loss at 433°C
- 70% weight loss at 471°C
After the experiment, a black brown molten residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test item.
DSC EXPERIMENT 1
An endothermic peak was observed between 25°C and 100°C. The endothermic effect was most likely caused by melting of the test item.The extrapolated onset temperature was 59.722°C. An exothermic peak was observed from 200°C. The exothermic effect was probably caused by reaction and/or decomposition of the test item. After the experiment, an orange molten residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test item.
DSC EXPERIMENT 2
In order to investigate the melting peak, a second experiment was performed and the end temperature was set to stop shortly after the melting peak. The extrapolated onset temperature was 59.319°C. After the experiment, a colourless molten residue remained in the sample container (original colour: white). It demonstrated that melting was the reason for the endothermic effect.
DATA HANDLING
The melting temperature was determined as the mean melting temperature of Experiment 1 (59.722°C) and Experiment 2 (59.319°C).
TGA and DSC curves are attached as background material.
Applicant's summary and conclusion
- Conclusions:
- The melting temperature of the substance was determined to be 59.5°C (332.7 K).
- Executive summary:
Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.
The melting temperature of the substance was determined to be 59.5°C (332.7 K).
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